安全带在急刹车时会约束乘客防止前冲。

The seat belt ___restrains the passenger from moving forward during sudden braking.

尽管很生气，他还是克制住了自己没有提高嗓门。

Though angry, he ___restrained himself from raising his voice.

警察不得不拦住那个激动的男子，防止他冲向人群。

The police had to ___restrain the agitated man to prevent him from rushing into the crowd.